[Bug c++/91607] [9 regression] internal compiler error: in equal, at cp/constexpr.c:1088

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91607

--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
That's why I haven't closed the PR.

Trunk seems to emit a potentially bogus error, reducing that.